Monstrum Level Bubble Products are built to check for proper vertical alignment of your rifle
Imperfect vertical alignment of your scope when shooting introduces scope cant error - horizontal drift of your shots due to cant - An anti-cant level bubble corrects for this issue, allowing you to quickly check for proper alignment of your rifle before each shot.
The level bubble attaches to your picatinny rail with a low profile design that slots in at the base of your of your rifle scope
